Hi Don, Input set to 1mW and using a K3 with a proper cable. When I switch back to receive the XV144 always switches back to receive - like I said, I can still hear louder stations. This doesn't mean that something on the board isn't continuing to emit some kind of RF though. The LEDs don't flash, they just illuminate and stay that way until I switch off the 12v DC power. I received another reply off-list from someone with a similar problem who suggested contacting Elecraft for a fix. 73 Stewart
-----Original Message----- From: Don Wilhelm [mailto:[email protected]] Sent: 14 December 2014 19:20 To: Stewart GM4AFF; [email protected] Subject: Re: [Elecraft] XV144 - power out with no drive Stewart, What input level do you have the XV144 set for? The 1mW level from the KXV3 or the high power input from the K3 ANT1 or ANT2 jacks? It is important that I know before I can venture a reasonable guess. Are you using the Elecraft transverter cable to operate the XV144, or do you have it configured for non-Elecraft and keying it with the PTT line (you should have one or the other, but not both). See the XVnnn Owner's Manual. One thing you can do is see if the XV144 is staying in transmit when it should be switching back to receive. When in receive, what is the voltage at the cathode of D4 - this is the 12T signal and should be zero during receive. The "all flashing LEDs" condition is an indication of an overload condition or getting RF input while the XV144 is still in receive. If you are using the 1 mW RF input, it should never trigger that condition. There are some XVnnn transverters that falsely detect an overload condition. That is due to noise on the COR detection line. An easy cure for that is to remove the front panel metalwork and solder a 0.1uf capacitor between the collector and emitter of Front Panel Q7. It can easily be added to the solder side of Q7 without removing the front panel board. 73, Don W3FPR On 12/14/2014 9:52 AM, Stewart GM4AFF wrote: > I have an intermittent problem with my XV144 (driven by a K3). On > transmit I can see power output on the LEDs (3 greens) even when there > is no audio input and the transverter is getting quite hot. Stations > tell me my signal sounds fine with no background noise. So it's generating RF somewhere else! > > > > Also, more seriously, occasionally, when I return to receive after > transmitting, the transverter LEDs all illuminate, I lose receive > sensitivity almost completely, although I can still barely hear louder > signals. The transverter won't transmit unless I switch off and on the > K3 and the XV144. This occurs more often as the transverter heats up. > > ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4235/8734 - Release Date: 12/14/14 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
